Älgö is a locality situated in Nacka Municipality, Stockholm County, Sweden.

[2] The town already met the resident requirement for an urban area (200) by a very wide margin, but then had too high a proportion of leisure properties.

Älgö, which then belonged to Brännkyrka parish, was mentioned for the first time in 1416 ('in Alghøø') when Katarina Erengisledotter redeemed 2/3 of the island from Kristoffer and Peter Kruse.

In a land register for Årsta estates, probably from 1529, a farm on Älgön is occupied.

Gabriel Kristersson (Oxenstierna) owned this croft in 1652, which then annually paid 2 öre money, 6 days' work and fodder for three horses in lease.